JPH09120289A - Keyboard device of electronic musical instrument, and electronic piano - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain an accurate touch response over the entire keyboard and improve successive key operability. SOLUTION: A jack tail sensor detects a jack tail equivalent member abutting at a 2nd specific position of a keyboard stroke before a let-off and a jack sensor detects the flank 28b of a jack equivalent member 28 abutting at a 1st specific position S1 of the keyboard stroke. The positions S1 and S2 can be arranged at deep stroke positions and the let-off does not affect the detection, so the positions S1 and S2 are stably detected and the time difference is obtained over the entire keyboard. The timing and intensity of sounding are controlled according to the detection data, so a touch response which is similar to that of an acoustic piano and accurately and stable over the entire keyboard is obtained at the time of sounding and even if the stroke becomes narrow at a deep side like successive key depression, accurate detection is enable and no break of sounding is generated.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a keyboard device for an electronic musical instrument and an electronic piano that apply a load simulating an action to the keyboard.

[0002]

2. Description of the Related Art An electronic piano emits an electronic sound from a speaker in response to a player's key depression / release operations. As a result of the improvements made to the sound produced by such an electronic piano, it has become unsatisfactory in recent years. You have reached a level you don't have. On the other hand, it has been pointed out that the touch feeling of the keyboard is significantly different from that of an acoustic piano, and various improvements have been made in this regard as well.

That is, an electronic piano equipped with an action load simulation member has been developed in order to bring the touch feeling of the keyboard closer to that of an acoustic piano. For example, as shown in FIG. 9, the keyboard P can be pivoted about an axis P10.
12 which has a hammer arm P14 for pressing the rear end portion of the keyboard 12 from above, and as shown in FIG. 10, which is swingable around an axis P16 and presses the keyboard P18 from below so that the tip of the keyboard P18 Hammer arm P for lifting
There is known one having 20 (Japanese Patent Laid-Open No. 4-3478).
95). The action load simulation members shown in FIG. 9 and FIG. 10 are all developed for the purpose of bringing an electronic piano having a low roof height into consideration and making it as close as possible to an acoustic piano.

However, in an acoustic piano, the wippen, jack, and bat have different axes, swing around each axis, and the bat separates from the jack at different timings depending on the key-pressed state, so that the keyboard The touch feeling is complicated.

On the other hand, in the keyboard equipped with the action load simulation member as shown in FIGS.
Since the weight swings around one axis, there is a problem that the touch feeling of the keyboard becomes monotonous compared with the acoustic upright piano.

To solve this problem, Japanese Patent Application No.
In No. 136740, by using a member equivalent to a wippen, a member equivalent to a jack, and a member equivalent to a hammer as an action load simulation member, an electronic piano with a touch feeling almost equivalent to an acoustic piano was proposed.

[0007]

However, although the touch feeling is almost equal to that of an acoustic piano, the touch response, that is, the sounding timing and sounding intensity (volume) or sound stopping timing for the key pressing / key releasing operation, is the same as before. It remained in a different state from the acoustic piano like the other electronic pianos.

Therefore, it has been considered to detect data capable of improving the touch response from a plurality of sensors from the action load simulation member. However, the detection may become unstable depending on the mounting positions of these plural sensors. In particular, when the volume is determined from the time difference between the detection timings of the two sensors, there is a large variation in the volume between the keyboards, and it may not be possible to realize a stable acoustic piano touch response. Further, depending on the mounting position of the sensor, there is a case where the sound cannot be produced well during repeated hits and there is a break.

As a result of various investigations for investigating the cause, a peak resistance generated on the keyboard particularly when the jack-equivalent member is separated (let-off) from the hammer-equivalent member (including accessory members interlocking with the hammer). The present invention has been completed by finding that the force influences the stability of the detection from the action load simulation member, and further that the position of the sensor with respect to the let-off influences the hitting property and the accurate sound control. did.

That is, the present invention provides not only a touch feeling but also a keyboard device of an electronic musical instrument or an electronic piano.
When making the touch response almost equal to that of an acoustic piano, it is possible to detect the timing and strength that correspond to string striking in a particularly stable manner, and the keyboard device for electronic musical instruments that does not cause problems with repeatability or accurate sound control. And to realize an electronic piano using it.

[0011]

A keyboard device for an electronic musical instrument according to claim 1, wherein an action load simulating member is swingably supported, and a wippen which swings as the keyboard swings by a key depression operation. An equivalent member, a jack equivalent member that is swingably attached to the wippen equivalent member, and that rises as the wippen equivalent member swings by a key depression operation, while the jack equivalent member rises to a predetermined position,
The jack-equivalent member is pushed up and rocks, and after the jack-equivalent member rises to a predetermined position, the jack-equivalent member collides with the hammer-equivalent member that moves apart from the jack-equivalent member and inertially moves, and the tip of the hammer-equivalent member that inertially moves. Since it has a stopper that prevents the operation of the hammer-equivalent member, the touch feeling of the keyboard is almost the same as that of an acoustic piano.

Further, in the first sensor, after a peak resistance force generated when the hammer equivalent member is separated (let off) from the jack equivalent member is generated on the keyboard, any one of the action load simulation members is provided. The timing at which the member reaches the first predetermined position (for example, S1 described later) is detected. Further, the second sensor is configured such that any one of the action load simulation members is in a second predetermined position before a peak resistance force generated when the hammer equivalent member is separated from the jack equivalent member is generated on the keyboard. (For example, S described later
Detect the timing when it came to 2).

As described above, the detection of the first sensor is performed after the peak resistance force generated on the keyboard when the hammer equivalent member is separated from the jack equivalent member (let off), that is, at the time of let off. It detects after the peak of the resistance that the keyboard receives. That is, the detection of the first sensor does not exist within the let-off resistance peak.

The detection by the second sensor is performed before the peak resistance force generated on the keyboard when the hammer equivalent member is separated (let off) from the jack equivalent member, that is, when the keyboard is let off. It is detected before the peak of the resistance received. That is, the detection of the second sensor does not exist within the peak of the resistance force of the let-off, and the detection of the second sensor is located with the peak of the resistance force of the let-off in between.

Even if the keys are pressed with the same force, the degree of change in the resistance force received by the keyboard from the hammer-equivalent member is different between inside the let-off resistance peak and before or after the let-off resistance peak. Even if there is a slight difference in the positions of the first and second sensors, the detection timing may differ. In particular, in the resistance force peak of the let-off, the difference in the resistance force due to the position is large compared to other states, so if the detection position of one sensor is included in this let-off resistance peak, Variations occur in volume and sounding timing.

There is no significant difference in the change in the resistance force received by the keyboard from the hammer equivalent member between the region before and after the peak of the let-off resistance force. Therefore, even if both sensors are present separately before and after the let-off, there is less variation in detection for each keyboard than when one of the sensors is present within the peak of the let-off.

The first sensor and the second sensor detect the timing at which any one of the action load simulation members arrives before and after such a let-off resistance peak, and the detection thereof is performed. The time difference between the timings is stable with little variation among the keys, and the timing corresponding to the string striking and the data corresponding to the string striking strength (volume) can be obtained with high accuracy.

Therefore, in an electronic musical instrument such as an electronic piano, it is possible to control the sounding timing and volume of the musical instrument in a stable and highly accurate manner on all keyboards, and with a stable touch response, the touch feeling and touch of an acoustic piano can be obtained. A response can be realized.

Further, since there is no let-off on the side where the keyboard stroke is deeper than the position of the first sensor, the first
The sensor can be arranged at a position sufficiently close to the string striking side in terms of keyboard stroke. The actual striking position of an acoustic piano is the deepest position beyond the limit of the keyboard stroke. Therefore, the time from the detection timing of the first sensor to the timing corresponding to the string striking is shorter than that when the first sensor is arranged at another position, and fluctuation due to disturbance or the like during that time can be reduced. It is possible to obtain the sounding timing with less error from the detection timing of the sensor.

Further, even when keys are repeatedly pressed and released with a small keyboard stroke on the string striking side, such as when the keys are repeatedly struck, the first sensor is higher than the peak of the let-off resistance force. Being deeper in the keyboard stroke, the second sensor can be placed closer to the peak of the let-off resistance. That is, since the first sensor and the second sensor sandwich the peak of the resistance force of the let-off between them, a sufficient interval can be obtained to measure an accurate time difference, and the first sensor is adjacent to the second sensor. Since this is not done, the second sensor itself can also be brought into close contact with the peak of the resistance force of the let-off, and can be positioned at a relatively deep keyboard stroke. Therefore, the sounding timing and sounding strength can be detected at a relatively deep keyboard stroke position, and the continuous hitting property is improved.

By designing the action load simulating member, as shown in FIG. 7, which will be described later, a flat portion (a portion where the load hardly changes) is provided on both the shallow and deep keyboard strokes from the let-off, and By arranging the first and second sensors in the flat portions respectively, the change in the keyboard stroke between the first and second sensors in all keyboards can be more accurately captured, so that more stable sounding timing and sounding strength ( Data) can be obtained.

As a member of any one of the action load simulation members to be detected by the first sensor or the second sensor, the keyboard, the wippen-equivalent member or the jack-equivalent member, or an accessory member thereof can be cited. . Further, a third sensor for detecting the key release timing can be provided. The third sensor detects the key release timing from, for example, the keyboard, the wippen equivalent member, the jack equivalent member, or any of these attached members.

The second sensor may also serve as the third sensor, and the cost of parts can be reduced. Therefore,
The keyboard device of the electronic musical instrument described above is incorporated in an electronic piano, and the electronic sound generation control means controls the sound generation timing based on the timing corresponding to the string striking detected by the first sensor. By controlling the strength of sound generation (volume) from the time difference from the timing detected by the sensor, and by controlling the sound stop timing based on the key release timing detected by the third sensor, the same touch feeling as acoustic feel is achieved. And you can play with stable touch response.

[0024]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS As shown in the schematic block diagram of FIG. 1, an upright type electronic piano 2 of the present embodiment has an action load simulation member 4, a keyboard 6, and a third number of the same number of thirds. A key release sensor 8 as a sensor, a jack tail sensor 9 as a second sensor in the same number as the number of keyboards 6, and a jack sensor 1 as a first sensor in the same number as the number of keyboards 6.
0, a control device 12, an electronic sound source 14, and a speaker 16. Among these, the action load simulation member 4, the keyboard 6, the key release sensor 8, the jack tail sensor 9 and the jack sensor 10 are keyboard devices.

As shown in FIG. 2, the action load simulating member 4 has a capstan screw-corresponding member 20 and a Wippen flange-corresponding member 22 which move up when the keyboard 6 swings clockwise in the drawing with the balance pin 18 as a fulcrum. Is swingably supported by the center rail equivalent member 24 via
A member corresponding to a wippen 26 that swings in the direction opposite to the swinging direction of the keyboard 6 when the member 20 corresponding to the capstan screw rises is swingably connected to the member 26 corresponding to the wippen, and a member 28a corresponding to the jack tail is regulated. A jack-equivalent member 28 that rises together with the wippen-equivalent member 26 until it comes into contact with the jack-tail sensor 9 that also serves as a jack-tail stopper felt-equivalent member provided at the lower end of the equivalent member 30, and a jack-equivalent member 2
The butt-corresponding member 34, which is abutted / separated from 8 and swingably supported by the center pin-corresponding member 32b of the bat flange-corresponding member 32a fixed to the center rail-corresponding member 24, and the bat-corresponding member 34. Connected,
When the bat equivalent member 34 is pushed up by the jack equivalent member 28, a hammer shank equivalent member 36 that swings in a direction opposite to the swing direction of the keyboard 6, and a bat equivalent member that protrudes in a direction orthogonal to the hammer shank equivalent member 36. A member 38 corresponding to the catcher shank projecting from 34,
Catcher-equivalent member 40 attached to the tip of the catcher-shank equivalent member 38, and hammer-shank equivalent member 3
An abutting portion 4 for abutting the hammer-equivalent member 42 attached to the tip of the hammer 6 and a side portion of the hammer-shank equivalent member 36 that is swung back after key depression to reduce vibration of the hammer-equivalent member 42.
4a is attached to the hammer rail equivalent member 44.

Unlike the usual acoustic upright piano, the hammer equivalent member 42 does not have a hammer felt, but the center of gravity is designed in consideration of the weight of the hammer felt. The jack sensor 10 is provided on the surface of the regulating rail 31a supported by the regulating bracket 31 on the side corresponding to the jack 28. This jack sensor 1
0 also serves as a member equivalent to a jack stopper felt, and is provided at a position where it can contact one side surface 28b of the member 28 corresponding to the jack when a key is pressed.

The jack-corresponding member 28 pushes up the bat-corresponding member 34 by its rising, and swings the hammer-corresponding member 42 integrated with the bat-corresponding member 34 through the hammer shank-corresponding member 36 counterclockwise in FIG. Then, the jack tail equivalent member 28a of the jack equivalent member 28 is moved to the regulating button equivalent member 30.
After contacting the jack tail sensor 9 of No. 1, the bat-equivalent member 34 is separated from the jack-equivalent member 28, that is, the let-off is performed, and the hammer-equivalent member 42 is hammered as a cushioning material of the hammer stopper 45 by inertial movement. It swings counterclockwise until it collides with the stopper felt 45a.

The jack sensor 10 is a member 3 corresponding to the bat.
After contacting the side surface 28b of the jack-equivalent member 28 after separating from 4, the jack-equivalent member serves as a jack stopper felt equivalent member. As described above, the jacktail sensor 28 has the jacktail sensor 28a before the peak of the resistance force from the hammer equivalent member 42 generated on the keyboard 6 at the time of let-off.
The contact timing can be detected. Further, since the side surface 28b of the jack equivalent member 28 comes into contact with the jack sensor 10 after the peak of the resistance force from the hammer equivalent member 42 generated on the keyboard 6 at the time of let-off, the contact timing can be detected.

The jack tail sensor 9 and the jack sensor 10 are hollow members made of rubber, and the jack tail equivalent member 28a or the side surface 28 of the jack equivalent member 28.
When b comes into contact, it is easily crushed and the internal conductive surface is configured to connect the internal terminals.

An example of the jack tail sensor 9 and the jack sensor 10 is shown in FIG. 6 (a). Sensor 9,1
A plate-shaped protruding portion 11b projects from the rubber head 11a of No. 0 inside the sensors 9 and 10, and two terminals 11e and 11f are provided on the bottom plate 11d inside the sensors 9 and 10.

When the key is depressed, when the side wall 11h is crushed by the jack tail-equivalent member 28a or the side surface 28b of the jack-equivalent member 28 by a predetermined amount, the plate-like protrusion 1 is formed.
The conductive surface 11i at the tip of 1b short-circuits the terminals 11e and 11f. That is, the sensors 9 and 10 are turned on.

As a result, the control device 12 is controlled by the control of FIG.
Each contact timing of the jack tail equivalent member 28a or the side surface 28b of the jack equivalent member 28 can be detected by detecting the change in impedance between the signal lines 11k and 11m shown in (b). The contact strength (contact speed) can be detected from the time difference between the contact timings of the sensors 9 and 10.

Further, as shown in FIG. 2, a shutter 50 is provided on the bottom surface of the keyboard 6. This shutter 50
Moves up and down as the keyboard 6 swings around the balance pin 18 as a fulcrum. The key-release sensor 8 provided below the keyboard 6 is a means that includes a photointerrupter and optically detects a key-release operation. When the shutter 50 blocks the optical path of this photointerrupter, an off-signal is emitted, and otherwise. Is configured to emit an ON signal.

Therefore, the key release sensor 8 continues to emit the OFF signal as long as the keyboard 6 is continuously pressed, and when the key is released, the OFF signal is switched to the ON signal. The key release timing can be detected by detecting the signal change from off to on. The control device 12 can control the sound stop timing based on the key release timing.

As shown in FIG. 1, the controller 12 has an input / output port 52, a well-known CPU 54, a ROM 56, and a RAM.
58, a backup RAM 60, a clock 62, and the like, which are configured as a logical operation circuit, which are connected to each other by a bus 64.
Connected by The control device 12 includes a key release sensor 8, a jack tail sensor 9 and a jack sensor 1.
0 is also connected via the input / output port 52, and is also connected to the electronic sound source 14 via the input / output port 52.

The CPU 54 detects the terminal connection timing of the jack sensor 10 and the time difference between this timing and the terminal connection timing of the jack tail sensor 9, and also detects the timing at which the signal of the key release sensor 8 switches from off to on. Then, these detection data and RO
A signal is output to the electronic sound source 14 based on the control program stored in the M56. Although not shown, a pedal sensor that detects the operation of a pedal mechanism such as a damper pedal or a soft pedal is also connected to the control device 12, and a signal is output to the electronic sound source 14 in consideration of this detection information. It is a thing.

The electronic sound source 14 is provided with a recording section for recording the performance sound of an acoustic piano, that is, a string striking sound, and a reproducing section for reading out the sound from this recording section. It is fixed to the outside and sounds to the outside through the speaker 16. As shown in FIGS. 3 and 4, the speaker 16 is attached to the player side, that is, the front side by a back plate 48.

Next, the operation of the upright electronic piano 2 having the above configuration will be described. When the player presses a key on the keyboard 6, as shown in FIG.
6 swings in the direction opposite to the swinging direction of the keyboard 6 (counterclockwise in the figure), and accordingly, the jack-equivalent member 28 rises to push up the bat-equivalent member 34. Then, the bat-corresponding member 34 swings together with the hammer shank-corresponding member 36 and the hammer-corresponding member 42 in the direction opposite to the swinging direction of the keyboard 6 (counterclockwise in the drawing). And the member 2 corresponding to the jack
When 8 is raised to a predetermined position, the jack-equivalent member 28a contacts the jack-tail sensor 9 at the lower end of the regulating button equivalent member 30, so that the jack-equivalent member 28 moves in the swinging direction of the keyboard 6 (clockwise in the figure). It swings largely and is separated (let off) from the member 34 corresponding to the bat. Therefore, the bat equivalent member 34 after the jack equivalent member 28 is separated is the hammer shank equivalent member 3
6 and the hammer-corresponding member 42 perform inertial movement.
After the jack-equivalent member 28 is separated from the bat-equivalent member 34, the jack-equivalent member 42 comes into contact with the jack sensor 10 at its side surface 28b and stops. Is blocked.

Next, the tone generation processing by the control device 12 when the performance is performed as described above will be explained based on the flowchart of FIG. This process is an interrupt process that starts when the terminals 11e and 11f of the jack tail sensor 9 are short-circuited (hereinafter referred to as "on"), that is, when the second sensor is turned on. When this process is started, first, the jack tail sensor 9 is turned on (the second sensor is turned on).
The side surface 2 of the jack-equivalent member 28 within a predetermined time after
The terminals 11e, 1 of the jack sensor 10 are contacted by the contact of 8b.
It is determined whether or not 1f is short-circuited (first sensor ON) (S110). That is, when the ON signal is input from the jack tail sensor 9 to the control device 12 and then the ON signal is input from the jack sensor 10 to the control device 12 within a predetermined time, the side surface 28b of the jack-equivalent member 28 is abutted. When it is detected, that is, it is determined that it is the timing corresponding to the string striking. This predetermined time is set to be a little longer than the time from when the jack tail sensor 9 is turned on to when the jack sensor 10 is turned on, which is possible when the key operation is normally performed.

Therefore, in step S110, if the ON signal from the jack sensor 10 is not detected within the predetermined time (NO in step S110), the process is terminated as it is, and one of the jack tail sensors 9 is turned on again. Wait for you. On the other hand, when the ON signal of the jack sensor 10 is detected within the predetermined time in S110, it is determined that the effective operation of the jack-equivalent member 28 is detected (YES in step S110), the input / output port 52 or the RAM.
The time difference ΔT between the timing at which the ON signal of the jack tail sensor 9 stored in 58 and the timing at which the ON signal of the jack sensor 10 is input is obtained, and the contact strength (string striking strength) is calculated from this time difference ΔT. P (corresponding to) is calculated by the following equation, for example (S120).

[0041]

(Equation 1)

Here, K is a constant. Then, the frequency and the amplitude are determined based on the position of the jack tail sensor 9 (or the jack sensor 10) on the tone range and the contact strength P, and a predetermined waveform signal is obtained. The sound source 14 is controlled to be sounded from the speaker 16 at the calculated sounding timing (S130).

After that, the key release sensor 8 at the same position on the range
The process waits for key release detection by (S140). That is,
When the signal of the key release sensor 8 is switched from OFF to ON, it is determined that the key release is detected (Y in step S140).
ES), and stop sounding from the electronic sound source 14 (S15
0), the process is temporarily terminated. Thereafter, every time the jack tail sensor 9 is turned on, the processing of FIG. 5 is repeated. If a plurality of keys are pressed, the processing of FIG. 5 is executed in parallel according to the number of pressed keys.

The upright electronic piano 2 of this embodiment has the following effects. . The bat equivalent member 34 is the hammer shank equivalent member 3
Since it is integrated with the hammer-corresponding member 42 via 6, the jack-corresponding member 28 gives kinetic energy to the hammer-corresponding member 42. The state in which the tip of the hammer-corresponding member 42 collides with the hammer stopper 45 by the kinetic energy is the same as the state in which a hammer in an acoustic piano hits a string. From this, the jack tail sensor 9 before and after the kinetic energy is applied to the hammer equivalent member 42.
Timing of contact of the member 28a corresponding to the jack tail with respect to the jack and the member 28 corresponding to the jack sensor 10
The abutting timing of the side surface 28b is data that reflects the timing and strength of string striking in the acoustic piano.

Therefore, the sound intensity (volume) is detected from the time difference between the detection timing of the jack tail sensor 9 and the detection timing of the jack sensor 10, and further the jack equivalent member 28 is detected from the detection timing of the jack sensor 10.
Of the touch response of the acoustic piano in the key-pressing operation by detecting the contact timing of the touch panel and controlling the sound generation by controlling the appropriate sounding timing and sound intensity (volume) based on this detection. Can be obtained.

Moreover, as shown in FIG. 7, the jack tail sensor 9 generates a peak resistance force generated when the bat equivalent member 34 interlocking with the hammer equivalent member 42 is separated (let off) from the jack equivalent member 28. The timing at which the jack tail equivalent member 28a arrives at the previous second predetermined position S2 in the region A where the resistance force is flat is detected. Further, in the jack sensor 10, a region B where the resistance force is flat after the peak resistance force generated when the bat equivalent member 34 interlocking with the hammer equivalent member 42 is separated (let off) from the jack equivalent member 28 is generated. The timing when the side surface 28b of the jack-equivalent member 28 reaches the first predetermined position S1 therein is detected.

As described above, the detection positions of the jack tail sensor 9 and the jack sensor 10 are not included in the let-off resistance peak. Therefore, in any of the keyboards 6, the detection timings of the jack tail sensor 9 and the jack sensor 10 and their time differences are always the key pressing timing and the key pressing speed of the player, or the timing corresponding to the string striking and the strength of the string striking. It can be stably and accurately obtained as data that accurately reflects this. That is, the data corresponding to the string striking timing and the string striking strength can be obtained with high accuracy in a stable state in all the keyboards 6.

Therefore, the upright type electronic piano 2
In the above, the sounding timing and sounding strength (volume) that faithfully reflect the keyboard operation of the player can always be stably and accurately performed, and the touch response is not unstable. Moreover, as shown in FIG. 7, the position S1 of the jack sensor 10 is located at a position where the keyboard stroke is deeper than the let-off. That is, since it is sufficiently close to the keyboard stroke limit L, it is located close to the keyboard stroke D corresponding to the actual string striking position of the acoustic piano. Therefore, the timing corresponding to the string striking is predicted from the detection timing of the jack sensor 10. However, the error can be suppressed.

Further, since only the second predetermined position is set in a region where the keyboard stroke is shallower than the let-off resistance peak, the jack tail sensor 9 can be sufficiently brought close to the let-off resistance peak, and the performance can be improved. Even if the key stroke is performed with a relatively small keyboard stroke width on the deep keyboard stroke side, such as a continuous hit, the jack tail sensor 9 and the jack sensor 10 can detect the sound sufficiently and the sound is not interrupted.

Further, as for the position of the let-off, only the first predetermined position S1 exists on the deep side of the keyboard stroke.
Since the let-off can be placed on the deep side of the keyboard stroke, it can be brought even closer to the touch feeling of an acoustic piano. Further, since the key release sensor 8 detects the timing at which the keyboard 6 is released, the control device 12 can also obtain a reliable sound stop timing. The position of this key release on the keyboard stroke is
Whether it is deeper or shallower than the let-off, avoid the let-off resistance peak. When detecting the key release timing deeper than the let-off, it is set at least shallower than the position S1 of the first sensor.

Thus, the jack tail sensor 9 detects the contact timing with the jack tail equivalent member 28a, the jack sensor 10 detects the contact timing with the side surface 28b of the jack equivalent member 28, and the key release sensor 8 is detected. By detecting the timing when the keyboard is released, the sound generation timing, sound intensity (volume) and sound stop timing can be reliably and stably obtained in a state equivalent to an acoustic piano, and the touch response is also acoustic. It can be equivalent to a piano.

[0052] The jack tail sensor 9 is composed of a rubber switch and also serves as a member corresponding to the jack tail stopper felt of the jack tail equivalent member 28a, and the rubber material serves as a cushioning material.
Reference numeral 0 is a rubber switch, and a jack-equivalent member 28
Since the rubber material also serves as a member equivalent to the jack stopper felt on the side surface 28b of the device and the rubber material serves as a cushioning material, the occurrence of abnormal noise is particularly small, and it is necessary to specially provide the member equivalent to the jack tail stopper felt and the member equivalent to the jack stopper felt. There is no.

[0053] Like the acoustic piano, the wippen equivalent member 26, the jack equivalent member 28, and the bat equivalent member 34 swing around their own axes. Further, the member 42 corresponding to the hammer is the member 3 corresponding to the bat.
4 is pushed up by the jack-equivalent member 28 to start swinging, and then the jack-equivalent member 28 separates from the bat-equivalent member 34 to perform inertial movement. Further, the hammer-equivalent member 42 during this inertial movement is moved to the hammer stopper. 45 has stopped. Therefore, even though it is an electronic piano, the same complex touch feeling as that of an acoustic piano can be obtained.

[0054] In terms of appearance and also the internal action part, at first glance it is similar to an acoustic piano,
It has a profound feeling and beauty as an interior. . Since it is not necessary to stretch the strings, a weight member such as a frame and a pillar is not required as compared with an acoustic piano, and a damper is not required, so that weight reduction and cost reduction can be achieved.

[Others] In the above-described embodiment, the optical sensor is used as the key release sensor 8, but a rubber switch may be used like the jack tail sensor 9 and the jack sensor 10. Further, although rubber switches are used for the jack tail sensor 9 and the jack sensor 10, an optical sensor like the key release sensor 8 may be used.

Further, instead of the key release sensor 8, the jack tail sensor 9 or the jack sensor 10, a so-called leaf switch can be realized by a metal spring 70 as shown in FIG. That is, the spring 70 is curved and the intermediate portion 70a thereof is in a protruding state. The base end 70b of the spring 70 is electrically connected to the terminal 76. The tip 70c of the spring 70 is directed to the terminal 78 side. Therefore, the keyboard 6, the jack tail equivalent member 28a, or the side surface 28b of the jack equivalent member 28.
However, when pushing down the intermediate portion 70a of the spring 70, the spring 7
When 0 is distorted by a predetermined amount, the tip 70c of the spring 70 contacts the terminal 78.

By this key pressing operation, the terminals 76 and 78 are short-circuited, so that the collision timing can be detected as in the case of the rubber switch shown in FIG.
The spring 70 is the keyboard 6 and the jack tail equivalent member 28a.
Alternatively, in order to prevent the side surface 28b of the jack-equivalent member 28 from being completely crushed, rubber cushioning materials 82 are arranged on both sides of or around the spring 70, and the keyboard 6, the jack tail-equivalent member 28a, or the jack-equivalent member 2 is provided.
If the side surface 28b of 8 collides with the cushioning material 82, the spring 70 is prevented from being crushed any more.

In addition to this, the key release sensor 8, the jack tail sensor 9 or the jack sensor 10 can be constructed by using a pressure sensor or the like, and any sensor may be used. Although the upright type electronic piano is used in the above-described embodiment, the configurations of the keyboard device and the electronic piano of the electronic musical instrument of the present invention can be similarly applied to the grand piano type.

In the above-described embodiment, the operation of the keyboard 6 is directly detected in order to obtain the key release timing. However, if the operation of the keyboard 6 is an accessory, the operation of the accessory of the keyboard 6 is performed. It is also possible to detect the key release timing by detecting. Further, even if the key release sensor 8 is not specially provided, for example, the timing at which the jack tail sensor 9 is turned on may be detected as the key release timing. That is, the jack tail sensor 9 may also function as the key release sensor 8. The jack sensor 10 may also function as the key release sensor 8.

In the jack tail sensor 9 or the jack sensor 10, the second predetermined position or the first position
The arrival of any position of the jack-equivalent member 28 may be detected if the detection timing of the predetermined position is known.

[Brief description of the drawings]

FIG. 1 is a schematic block diagram of an upright electronic piano according to an embodiment.

FIG. 2 is a configuration explanatory view of an action load simulation member according to the embodiment.

FIG. 3 is a perspective view of the upright electronic piano of the embodiment as seen from the back side.

FIG. 4 is a schematic vertical sectional view of the upright electronic piano of the embodiment.

FIG. 5 is a flowchart of a sound generation process executed by the control device of the embodiment.

6A and 6B are explanatory views of the jack sensor and the jack tail sensor of the embodiment, FIG. 6A is a sectional view thereof, and FIG. 6B is an explanatory view of a short-circuited state of terminals.

FIG. 7 is a graph for explaining a correspondence between a keyboard stroke and a sensor detection position.

FIG. 8 is a configuration explanatory diagram of a leaf switch that can be used instead of a rubber switch of a key release sensor, a jack sensor, or a jack tail sensor.

FIG. 9 is an explanatory diagram of a keyboard of a conventional example.

FIG. 10 is an explanatory diagram of a keyboard of a conventional example.

[Explanation of symbols]

2 ... Upright type electronic piano 4 ... Action load simulation member 6 ... Keyboard 8 ... Key release sensor 9 ... Jack tail sensor 10 ... Jack sensor 12 ... Control device 14 ... Electronic sound source 16 ... Speaker 26 ... Wippen equivalent member 28 ... Jack equivalent Member 28a ... Jack tail equivalent member 28b ... Side surface 34 ... But equivalent member 36 ... Hammer shank equivalent member 42 ... Hammer equivalent member 45 ... Hammer stopper 50 ... Shutter 52
I / O port 54 ... CPU

Claims (8)

[Claims] 1. A keyboard device for an electronic musical instrument, which applies a load simulating an action to a keyboard, which is swingably supported and swings as the keyboard is swung by a key depression operation. A jack-corresponding member that is swingably attached to the wippen-corresponding member and that rises as the wippen-corresponding member swings by a key pressing operation, and is pushed up by the jack-corresponding member while the jack-corresponding member rises to a predetermined position. Rocks,
After the jack-equivalent member moves up to a predetermined position, the hammer-equivalent member moves apart from the jack-equivalent member and inertially moves,
And an action load simulation member having a stopper that collides with the tip of the hammer-equivalent member that is inertially moving to prevent the operation of the hammer-equivalent member, and a peak that occurs when the hammer-equivalent member separates from the jack-equivalent member. First sensor for detecting the timing when any member of the action load simulation member reaches the first predetermined position after a strong resistance force is generated on the keyboard, and the hammer equivalent member is separated from the jack equivalent member. A second sensor for detecting the timing at which any one of the action load simulation members comes to the second predetermined position before a peak resistance force generated at the time of occurrence on the keyboard, Electronic musical instrument keyboard device. 2. The action load simulation member, which is a detection target of the first sensor, is the keyboard, the wippen equivalent member, the jack equivalent member, or an accessory member thereof. A keyboard device for an electronic musical instrument according to claim 1. 3. The action load simulation member, which is a detection target of the second sensor, is the keyboard, the wippen equivalent member, the jack equivalent member, or an accessory member thereof. A keyboard device for an electronic musical instrument according to claim 1. 4. A region where the resistance force is substantially constant is provided before and after the peak resistance force generated when the hammer equivalent member is separated from the jack equivalent member is generated on the keyboard. In this area, the second resistance is applied to the area before the peak resistance force is generated on the keyboard.
The keyboard device for an electronic musical instrument according to any one of claims 1 to 3, wherein a predetermined position is set, and the first predetermined position is set in an area after the peak resistance force is generated on the keyboard. . 5. The keyboard device for an electronic musical instrument according to claim 1, further comprising a third sensor for detecting a key release timing. 6. The key release timing detection device according to claim 5, wherein the third sensor detects the key release timing from the keyboard, the wippen-equivalent member, the jack-equivalent member, or any of these attached members. Electronic musical instrument keyboard device. 7. The keyboard device for an electronic musical instrument according to claim 5, wherein the second sensor also serves as a third sensor. 8. A keyboard device for an electronic musical instrument according to any one of claims 5 to 7, wherein a sounding timing is controlled based on a timing detected by the first sensor, and the timing and the second sensor detect the sounding timing. An electronic sound generation control unit that controls the strength of sound generation based on a time difference from the timing and controls the sound stop timing based on the key release timing detected by the third sensor. piano.